下周美联储会议前做空美股的人不少 As equities hover near a record, options traders are piling into contracts betting the stock market will go down, pushing the price of of a number of put contracts up and call contracts down. The gap has become so wide that earlier this week you could sell a single put contract that pays out if the S&P 500 drops to 4,200 by late October to fund 18 calls that pay out if the index jumps to 4,600 by then.